The current approach to optimizing the urban intersections is to set waiting-areas for left-turning and waiting-areas for direct movement. But the two methods have their own setting conditions, and have some re- quirements for geometric characteristics of the intersections and traffic. The integrated area is a new method for the improvement of the intersections in recent years, which can increase the queuing capacity, shorten the queu- ing length indirectly, and reduce the vehicle delay on the basis of making full use of the road space. In order to optimize the traffic situation, the site survey and analysis of the intersection of Changnan Road and Yingbin North Road in Nanchang city were carried out. The integrated waiting area was set to optimize the intersection, and the road modeling and simulation were carried out. The research results show that the setting of the integrat- ed waiting area can improve the traffic capacity and efficiency of the intersection as well as reduce the delay.